Finding the Fourth Proportional to 61,105.20, 91,528.20 and 50,737.20

Step by Step Solution

1. Step 1: Write the proportion equation
   61,105.20 : 91,528.20 = 50,737.20 : x
2. Step 2: Convert to fraction form
   61,105.20/91,528.20 = 50,737.20/x
3. Step 3: Cross multiply
   61,105.20x = 91,528.20 × 50,737.20
4. Step 4: Simplify right side
   61,105.20x = 4,643,884,589.04
5. Step 5: Solve for x
   x = 4,643,884,589.04/61,105.20
6. Step 6: Final answer
   x = 75,998.19